As well as reviving the economy, governments are concerned about protecting taxpayers' money, and so will not want to buy bonds at high risk of default.

除了复苏经济以外，政府也想保护纳税人的钱，所以不愿意购买违约风险高的债券。

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Even if those predicted default rates are high, the risk can be mitigated by techniques such as overcollateralisation, where there is an excess of loans to cover losses.

即使预期的违约风险很高，仍可以通过诸如有足够的贷款补偿损失的超额抵押技术，从而降低风险。

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These firms have traditionally faced interest rates that seem unjustifiably high given their low risk of default.

传统意义上，这些公司已经在面对那些高的似乎异于寻常的利率，这类利率反哺给公司以低违约风险。

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It was unable to raise money on international bond markets due to the massively high interest rates demanded for its bonds a reflection of the high risk of default that investors see in Greece.

NPR: Greece: Economic Recovery In Sight

If you put your whole bond portfolio into the Vanguard index fund, which is mostly in U.S. governments, you have a fairly low risk of default but a fairly high risk of not achieving a positive real return.

FORBES: Bond Funds: Higher Yields, Higher Defaults

Layering of risk means the borrowers courted by these lenders had multiple characteristics that would put them at high risk for default, including no down payment, no documentation of income or assets, low credit scores and second mortgage in lieu of a down payment.

FORBES: Magazine Article